Helping companies to design and implement secure and scalable Java, Spring Boot applications

Do you need to leverage Spring Boot and/or Spring Framework in an Agile environment?

Do your applications need to integrate with 3rd party systems and/or in-house applications using SOAP, RESTful APIs or via Pub/Sub messaging?

Do you need to modernize your legacy Java applications?

Do you need a Proof of Concepts to make a decision about which technology to use?

I have two decades of experience developing Java Enterprise applications, helping with Web Applications, Systems Integration, Application Modernization, and Cloud adoption and migration.

I’m also a Spring Framework advocate which I started using during its 2.0 days, back in 2007.

Java and Spring ecosystem expertise

Spring Boot

• JSON-Formatted Logs in Spring Boot applications with Slf4j, Logback and Logstash

• Sending Emails with Spring Boot and Thymeleaf

• Implementing and configuring Servlets, Filters and Listeners in Spring Boot applications

• Implementing a custom Spring Boot starter for CXF and Swagger

• Implementing a custom Maven Archetype to generate Spring Boot-based services

Spring Data

• Writing dynamic SQL queries using Spring Data JPA repositories and EntityManager

• Writing dynamic Cosmos DB queries using Spring Data Cosmos repositories and ReactiveCosmosTemplate

• Writing dynamic SQL queries using Spring Data JPA Specification and Criteria API

• Preventing N+1 SELECT problem using Spring Data JPA EntityGraph

• Fixing Hibernate HHH000104 firstResult maxResults warning using Spring Data JPA Specification and Criteria API

• Multi-tenant applications using Spring Boot, JPA, Hibernate and Postgres

Spring Framework

• Troubleshoot Spring Framework’s RestTemplate Requests Timeout

• Parsing CSV responses with a custom RestTemplate HttpMessageConverter

• An alternative approach to ThreadLocal using Spring

• Caching using RestTemplate, Ehcache and ETags

Spring Cloud

• Microservices Sidecar pattern implementation using Postgres, Spring Cloud Netflix and Docker

• Routing requests and dynamically refreshing routes using Spring Cloud Zuul Server

• Multi-version Service Discovery using Spring Cloud Netflix Eureka and Ribbon

• Refreshable Configuration using Spring Cloud Config Server, Spring Cloud Bus, RabbitMQ and Git

Unit, Integration, Load Testing

• Writing integration tests with Testcontainers and Cosmos DB Docker emulator for Spring Boot applications

• Writing integration tests with GreenMail and Jsoup for Spring Boot applications that send Emails

• Unit testing Spring’s TransationTemplate, TransactionCallback with JUnit and Mockito

• Splitting Unit and Integration Tests using Maven and Surefire plugin

• Troubleshooting Spring Data JPA Specification and Criteria queries impact on Hibernate’s QueryPlanCache

Any question or concern?